John Cudahy, candidate for Lieutenant Governor Wisconsin 1916, U.S. Ambassador to Poland 1933–37, U.S. Minister to Ireland 1937–40, U.S. Ambassador to Belgium 1940, U.S. Minister to Luxembourg 1940. Uncle by marriage of Harold L. Ickes.
Ebon C. Ingersoll, Illinois State Representative 1856, U.S. Representative from Illinois 1864–71. Brother of Robert G. Ingersoll.
Robert G. Ingersoll, Illinois State Representative 1860, Attorney General of Illinois 1867–69, delegate to the Republican National Convention 1876. Brother of Ebon C. Ingersoll.
* John C. Ingersoll, U.S. Consul in Cartagena, Colombia 1902. Son of Ebon C. Ingersoll.
Jared Ingersoll, Delegate to the Continental Congress from Pennsylvania 1780, Attorney General of Pennsylvania 1791–1800 1811–16, U.S. Attorney of Pennsylvania 1800–01. First cousin of Jonathan Ingersoll.
* Charles Jared Ingersoll, U.S. Representative from Pennsylvania 1813–15 1841–49, U.S. District Attorney of Pennsylvania 1815–29, Pennsylvania State Representative 1830, delegate to the Pennsylvania Constitutional Convention 1837. Son of Jared Ingersoll.
* Joseph Reed Ingersoll, U.S. Representative from Pennsylvania 1835–37 1841–49, U.S. Minister to Britain 1852–53. Son of Jared Ingersoll.
** Colin M. Ingersoll, acting U.S. Charge D'Affaires in Russia 1848, U.S. Representative from Connecticut 1851–55, Adjutant General of Connecticut 1867–71. Son of Ralph Isaacs Ingersoll.
** Charles R. Ingersoll, delegate to the Democratic National Convention 1864, Governor of Connecticut 1873–77. Son of Ralph Isaacs Ingersoll.
*** Charles Edward Ingersoll, delegate to the Democratic National Convention 1896, candidate for U.S. Representative from Pennsylvania 1902. Grandson of Charles Jared Ingersoll.
*** George Pratt Ingersoll, candidate for U.S. Representative from Connecticut 1910, U.S. Minister to Siam 1917–18. Son of Colin M. Ingersoll.
Peter Irving, New York Assemblyman 1802–03. Brother of William Irving, John T. Irving and Washington Irving.
John T. Irving, New York Assemblyman 1816–17 1818–20, Judge of the New York Court of Common Pleas 1821–38. Brother of William Irving, Peter Irving and Washington Irving.
Washington Irving, U.S. Minister to Spain 1842–46. Brother of William Irving, Peter Irving and John T. Irving.
NOTE: Ralph Izard's daughter was also daughter-in-law of South Carolina Assemblyman Benjamin Smith and sister-in-law of Continental Congressional Delegate Isaac Motte, Izard's nieces were daughters-in-law of Georgia Colony Governor James Wright and U.S. Representative Thomas Pinckney.
